php获取dom html元素

以下查询查找 table 具有 content_table 类,然后提取 td it中的值:

<?php

$html = '<table class="content_table">
<tbody>
   <tr>
      <td>Value1</td>
      <td>Value2</td>
      <td>Value3</td>
   </tr>
   <tr>
      <td>Value1</td>
      <td>Value2</td>
      <td>Value3</td>
   </tr>
</tbody>                                               
</table>';
$dom = new DOMDocument('1.0', 'UTF-8');
$dom->loadHTML($html);
$xpath = new DOMXPath($dom);

$data = [];
foreach($xpath->query('//table[@class="content_table"]') as $table) {
    foreach($table->getElementsByTagName('td') as $td) {
        $data[] = $td->nodeValue;
    }
}

print_r($data);

或者如果你只需要 td公司 具有 content\u表格 类,然后执行以下任务:

foreach($xpath->query('//td[@class="content_table"]') as $td) {
    $data[] = $td->nodeValue;
}

html示例:

$html = '<table class="content_table">
<tbody>
   <tr>
      <td>Value1</td>
      <td class="content_table">Value2</td>
      <td>Value3</td>
   </tr>
   <tr>
      <td>Value1</td>
      <td class="content_table">Value2</td>
      <td>Value3</td>
   </tr>
</tbody>                                               
</table>';